The invention discloses a relay-controlled high-current load contact protection circuit which comprises a resistive or inductive load RL and a relay RL1, wherein one end of the resistive or inductive load RL is connected with a first contact end J1 of the relay RL1, and the other end of the resistive or inductive load RL and a second contact end J2 of the relay RL1 are connected with a power supply respectively, so that a loop is formed; bidirectional controllable silicon TR1 is connected between the first contact end J1 and the second contact end J2 of the relay RL1 in parallel. The protection circuit is reasonable and skillful in design, simple in structure and relatively small in volume; by arrangement of the bidirectional controllable silicon connected with the contact ends of the relay in parallel, the bidirectional controllable silicon can be switched on at first before the circuit needs to be switched on or off by the relay, then the relay is switched on or off, and at last the bidirectional controllable silicon is switched off; as the bidirectional controllable silicon is a contact-free switch, the spark phenomenon caused by switch-on or switch-off of the contact ends of the relay can be avoided.